Rotary kiln



Dec. 9, 1941. H. VANDERWERP ROTARY KILN Filed June 50, 1959 5 SheetsSheet 1 Dec. 9, 1941. H. VANDERWERP 2,265,556

ROTARY KILN Filed June 30, 1959 3 Sheets-Sheet 2 j &wzaierzder,b.

3 Sheets-Sheet 3 ROTARY KILN H. VANDERWERP Filed June 50, 1939 Dec. 9, 1941.

NM NM Patented Dec. 9, 1941 UNITED STATES. PATENT, OFFICE ao'raar mm Henry Vanflerwerp, Cleveland, Ohio .Application June 30, 1939, Serial No. 282,105 1 Claim. (01. 34'63) The invention relates to improvements in rotary kilns of the type commonly used for producing cement blinkcr, the present invention constituting an improvement on the constructions of kilns disclosed in my prior Patents No. 2,132,709, granted me October 11, 1938, for R- tary kiln, and No. 2,132,710, granted me October 11, 1938, for Apparatus for producing cement clinker.

The primary object of the present invention is the provision of an improved means for introducing air into such kilns;

Another object of the invention is the provision of a kiln of the character indicated so constructed and arranged as to occupy less lateral and vertical space.

Other objects will appear hereinafter.

The invention consists in the combinations and arrangements of parts hereinafter described and claimed. v

The invention will be best understood by reference to the accompanying drawings forming a part of this specification and in which Fig. 1 is anend view, with portions broken away, disclosing a rotary kiln embodying the invention;

Fig. 2 a side view of the discharge end of said kiln;

Fig. 3 an enlarged partial section, with portions broken away, taken substantially on line 3-3 of Fig. 2;

Fig. 4 a partial section taken substantially on line 4-4 of Fig. 3;

Fig. 5 a partial section taken substantially on line 5-5 of Fig. 3;

Fig. 6 a section taken substantially on line H of Fig. 5;

Fig. 7 an end view of the discharge end of a modified form of kiln; and

Fig. 8 a partial side view and section corresponding with Fig. 7.

in Figs. 1, 2, 3, 4, 5, and 6 comprises a suitable rotary inclined kiln ll having a recuperator and cooling chamber II at its discharge end provided with air ducts or flues I! in its periphery and tuyre blocks or heads I! arranged on the The kiln proper, including the recuperator and cooling chamber, is fully disclosed and described in my said prior patents, and more particularly Egssent invention except in so far as the same in Patent No. 2,132,710, and forms no part of the perates with the parts to be presently de- The embodiment of the invention illustrated inside thereof in open communication therewith.

or the inner wall of the wind box and is of an angular extent suflicient to register with a number of ports 20 formed in an annular blast ring 2| secured as shown over the ends of the air ducts l2 and whereby air from the wind box M will be freely admitted to the lower air ducts I: as the'port I9 is passed during the rotations of the kiln. As best shown in Fig. 3, the load of clinker being treated tends to accumulate as shown over the tuyre blocks l3 corresponding with the ports 20 thus open to the admission of air so that in normal operation the air thus admitted will pass upwardly through the load of clinker being treated for the purpose i'ully explained in my said patents.

To facilitate the rotation thus occurringbetween the kiln and the wind box, the blast ring.

21 is preferably provided with bearing rings 22 and 23 contacting with and rubbing against the inner side wall of the wind box as shown. Suitable barriers in the form of brass angles 24 are also preferably provided between the rings 22 and 23 to prevent the escape of air through the port l9 and the space between the blast ring 2i and the inner wall of the wind-box It to the upper ports 20 and thereby to escape entry through the load of clinker and enter the upper portion of the kiln. If desired, the arcuate port l9 may be made adjustable in length to vary the quantity of air admitted through the load of clinker and suitable valves may be provided in the partition or diaphragm Ii for admitting air to the upper ports!!! and thence to the upper portion of the kiln as is more fully explained 1 box II and lead over grooved pulleys 28 to weights 29 whereby the wind box is held yieldingly seated against the end of the kiln as will be readily understood. A flexible connection 30 the wind-box from a source,

' the bearing surfaces between the wind is provided for supp yin air not shown.

A firing hood 3! is arranged as shown adjacent the wind box I4 and is mounted upon wheels 32 so as to be capable of yielding and adjustment to accommodate expansions of the kiln.

A suitable fuel supply pipe 33 extends centrally through the firing hood SI and into the kiln III as indicated and whereby fuel is supplied to the kiln in the usual way.

A tubular discharge member 34 having a suitable removable lining as indicated is provided for the kiln and extends centrally through the wind box into the firing hood and discharges intreated in the usual way.

By these means air under pressure may be supplied to the chamber l I while rotating in a siniple and eflicient manner and -without the employto a passageway 35 from which it is removed and ment of circumferential projections or a wind box surrounding the same as were employed in the constructions of mysaid prior patents, and whereby the vertical and lateral dimensions of the kiln are materially decreased without impairing its capacity and complicated and expensive connections with the kiln avoided. Owing to the fact that tubular discharge 34 extends entirely through the wind box, the clinker fromthe kiln is prevented from falling upon and working into box and kiln and the consequent wear thereon thus prevented. The specific construction disclosed is a simple and effective one for the purpose.

In the modification illustrated in Figs. 7 and 8 under pressure to operation is the to be limited to the precise 2,265,656 a the wind box 14 is swingin ly supported in a.

gallows frame 36 upon swinging hangers or links 31 and a firing hood ll is rigidly connected to said wind box. The firing hood 38 is also provided with a discharge spout 39 for conductin thedlscharged clinker to the passageway 35. Cables ll! are also connected with the wind box and with weights 4| whereby the wind box is yieldingly held chamber ll.

same as above described.

While I have illustrated and described the preferred forms of construction for carying my invention into effect, these are capable of variation and modification without departing from the' spirit of the invention. 1, therefore, do not wish details disclosed but desire to avail myself of such variations and modifications as fall within the scope of the appended claim.

I claim:

A kiln comprising a rotary chamber; a nonrotating wind box seating against the end of said chamber, said chamber and wind box being provided with cooperatingv elements permitting the passage of. air from the box into the chamber, there being a central opening extending through said wind box; means for supplying air under pressure to said wind box; and a tubular dis-V charge for said chamber extending centrally from the adjacent end of said chamber and passing freely through the opening in said wind box.

HENRY VANDERWERP;

seated against the end of the Otherwise the construction and 

